clarence river estuary marie savina-rolland, scott condie, penny johnson, donna hayes, beth fulton,...
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Clarence River Estuary
Marie Savina-Rolland, Scott Condie, Penny Johnson, Donna Hayes, Beth Fulton, Bec Gorton, Rich Little
Coastal MSE workshop 2-3/02/2011
CSIRO. Coastal MSE workshop – 02-03/02/2010
NSW DPI / WfO collaboration
Development/evaluation of tools to assist with implementation of ecosystem-based management of NSW aquatic resources
NSW shelf: • Testing alternative fisheries harvest strategies• Effectiveness of existing and proposed marine reserves
Clarence River Estuary
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Issues and approach
Impacts on the estuarine environment and fisheries due to:• Changes in land-use
• historical change from grazing to sugarcane on the floodplain• urbanisation of coastal areas and reforestation of the upper catchment
• Major freshwater extraction for use in other catchments
• Changes in catchment inputs due to climatic changes
Approach based on whole-of-system modelling using Atlantis• Scenario modelling
• Testing assessment models and management strategies• Coastal Lakes Assessment and Management (CLAM) tool• Fisheries stock assessments and management strategies
CSIRO. Coastal MSE workshop – 02-03/02/2010
Clarence River Estuary– largest in NSW
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Multiple channels and coastal lakes
•Courtesy of WBMCourtesy of WBM
•An under-utilised An under-utilised freshwater resource? freshwater resource?
CSIRO. Coastal MSE workshop – 02-03/02/2010
CREAM model domain
47 boxes – water column and sediment layers47 boxes – water column and sediment layers
CSIRO. Coastal MSE workshop – 02-03/02/2010
Inputs specified at subcatchment level(freshwater, sediments, nutrients – CCA)
CSIRO. Coastal MSE workshop – 02-03/02/2010
CREAM trophic structure
small phytoplanktonsmall phytoplankton
large phytoplanktonlarge phytoplankton
small zooplanktonsmall zooplankton
large zooplanktonlarge zooplankton seagrassseagrass
macroalgaemacroalgae
microphytobenthosmicrophytobenthos
meiobenthosmeiobenthos
amphipodsamphipods polychaetespolychaetes
deposit feedersdeposit feeders
Mud crabMud crab
other macrozoobenthosother macrozoobenthos
bivalvesbivalvesothers filter feedersothers filter feeders
grazersgrazers
school prawnschool prawn
king prawnking prawn
cephalopodscephalopods
bullsharkbullshark
spotted wobbegongspotted wobbegong
estuary stingrayestuary stingray
bottlenose dolphinbottlenose dolphin
omnivorous seabirdsomnivorous seabirds macroinvertivorous seabirdsmacroinvertivorous seabirds miscivorous seabirdsmiscivorous seabirds
luderickluderick
tarwhinetarwhine
snub-nosed garfishsnub-nosed garfish
com mulletscom mullets
sand whitingsand whiting
yellowfin breamyellowfin bream
dusky flatheaddusky flatheadeelseels
mulllowaymullloway
other piscivorousother piscivorous
other herbivorousother herbivorous
other omnivorousother omnivorous other small demersal invertivorous other small demersal invertivorous
other large demersal invertivorousother large demersal invertivorous
small planktivoressmall planktivores
large planktivoreslarge planktivores
benthic bacteriabenthic bacteria
pelagic bacteriapelagic bacteria
Qualitative and quantitative validation (limited data – mainly biogeochemical)
CSIRO. Coastal MSE workshop – 02-03/02/2010
CSIRO. Coastal MSE workshop – 02-03/02/2010
Scenario results (1951-2003)
CSIRO. Coastal MSE workshop – 02-03/02/2010
CLAM – Coastal Lake Assessment & ManagementBayesian Network – based on expert opinion
CSIRO. Coastal MSE workshop – 02-03/02/2010
Model coupling
CREAMCREAM
Virtual Virtual ManagerManager
MonitoringMonitoring
AtlantisAtlantis
CLAMCLAM
CSIRO. Coastal MSE workshop – 02-03/02/2010
Lake Wooloweyah CLAM scenarios
New urban development
No development
Construction without (without) controls for site runoff
Development using conventional (best practice) stormwater
Agricultural land management
No change
Foreshore buffers and fencing
Best practice application of fertilisers and pesticides
Commercial fishing activities
No change
Increase in minimum size of prawns permitted to be caught
Banning of all commercial prawn trawling
Increase in prawn trawling by 50% on current levels
CSIRO. Coastal MSE workshop – 02-03/02/2010
Lake Wooloweyah CLAM scenarios
New urban development
No development
Construction without (without) controls for site runoff
Development using conventional (best practice) stormwater
Agricultural land management
No change
Foreshore buffers and fencing
Best practice application of fertilisers and pesticides
Commercial fishing activities
No change
Increase in minimum size of prawns permitted to be caught
Banning of all commercial prawn trawling
Increase in prawn trawling by 50% on current levels
CLAM focused on CLAM focused on one-off decisions with one-off decisions with
limited scope for limited scope for adaptive strategiesadaptive strategies
CSIRO. Coastal MSE workshop – 02-03/02/2010
Lake Wooloweyah CLAM scenarios
New urban development
No development
Construction without (without) controls for site runoff
Development using conventional (best practice) stormwater
Agricultural land management
No change
Foreshore buffers and fencing
Best practice application of fertilisers and pesticides
Commercial fishing activities
No change
Increase in minimum size of prawns permitted to be caught
Banning of all commercial prawn trawling
Increase in prawn trawling by 50% on current levels
CLAM focused on CLAM focused on one-off decisions with one-off decisions with
limited scope for limited scope for adaptive strategiesadaptive strategies
Aspects of CLAM based on Aspects of CLAM based on false assumptions:false assumptions:-influence of broader systeminfluence of broader system-temporal variabilitytemporal variability-what limits seagrasswhat limits seagrass
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Thank you
Scott CondieBeth FultonBec GortonRich LittleMarie Savina